Attachment for road-grader blades



June 23, 1925. 1,543,222

J. H. MCVEETY ATTACHMENT FOR now GRADER amass Filed April 4. 1925llamesHM- eei INV E on MMX-MM- ,5 M4 MW v I.

ATTORNEY Patented June 23, 1925.

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'ATTACHIvIE-NT FOR ROAD-GRADEB BLADES.

Application fil ed April 4, 1925 Serial in. 29,749.

This invention relates to attachments for road graders, road drags orother road maintenance machinery having a mold board or; blade, and thepresent appl cation is a d'vision in part of an application, filed by meAugust 25, 1924, Serial No. 734,105 for a patent on a shoe for graderblades, and which was allowed l lovember 26, 1924. The object of thepresent invention is to improve the means employed in road graders,roaddrags or other road maintenance machinery having a mold board orblade, used in what is known as maintenance work, by the provision of aheavy double-edged and reversible cutting bar for smoothing and draggingthe road, which may be easily and quickly applied in position at thelower act ve edge of the. usual moldboard or blade and of being rigidlyheld in position thereon, said cutter bar having a relatively widebearing surface on the lower face thereof to run over thegroundforspreading and smoothing the road, and having bevelled orinclinedfront and rear faces to cause the rear edge to be constantlysharpened, as the bar is worn along its lower face, while the front edgeis actively engaged. I l

A full and complete understanding of the invention may be obtained froma consideration of the following detailed description, taken inconnection with the accom-i panying drawing forming a part of thisspecification, it being understood that while the drawing shows apractical form of the invention, the latter is not to be confined tostrict conformity with the showing thereof, but may be changed ormodified, so long as such changes or modifications mark no materialdeparture from the salient features of the invention, as specificallypointed out in the appended claims.

In the drawing, in which similar reference characters designatecorresponding parts throughout the several figures Figure 1 is a sideelevation, partly in section, of a portion of a road grader and showingthe improved cutter ba r applied to the moldboard thereof.

Figure 2 is a detail perspective view of a portion of the cutter bar andthe angle iron for supporting, the same. v

In Figure 1 of the drawing there is shown a portion of one of the usualstandards or hangers employed in road scraping or grading machines, andwhich have con nected .to their lower ends the usual moldboard 2, sothat the latter may be elevated or tilted vertically, andat the sametime may have its angular relation'to the line of travel changed, asdesired.

The moldbo ard 2 which is curved, as shown, throughout its length, ispivotally connected near its lower edge to the lower ends ofthestandards or hangers 1, asshown at 3, and at the upper edge of themoldbcard, there is provided a pair of pivoted links 4 having a seriesof perforations for the reception of an adjusting bolt 6 whicl'i isadapted to traverses. suitable aperture in the standard to hold themoldboard the desired position. v

The lower edge of the moldboard is provided with a rcarwardly directedoffset to constitute a seat 7 extending from end to end of the same, andprovided intervals with apertures 8, said seat being thus lo cated atthe front of the moldboard.

l-in angle connecting bar 9 of substantial- 1y qual length with themoldboard is adapted to have one of its wings located in the H aforesaidseat 7, with its outer or forward face substantially flush with thefront curved face of the inoldboard, the said wing being provided withcounterbored apertures 10, which register with the aforesaid aperturesS, and ar traversed therewith by suitable bolts 11, the countersunkheads of which are located at the front face of the wing of the anglebar 9. I

The other wing 12 of the angle bar 9, which is arranged at anacute anglethereto, is thus directed towards the rear of the machine and in ahorizontal. position, the same being provided with suitable spacedapertures for the reception of tap screws 13 which serve to hold theimproved cutter bar 14 in position on the underside thereof.

The cutter bar 14 is formed of a relatively heavy and wide bar of hardsteel, which is considerably wider than thick, the front wall 15 of thesame being inclined Or beveled www as shown, to provide the frontcutting edge 16 adapted to enter the ground and sever the mounds or highplaces during the process of grading or smoothing the roadway. The rearwall or face 17 of the cutter bar is likewise beveled or inclined sothat the cutter bar may be taken off and reversed, thus giving a doublesurface cutting edgel The upper face of the bar is provided with properthreaded openings for the lower threaded ends of the tap screws 13, sothat it is an easy opertion to apply the cutter bar in position or toremove the same for replacement.

In the use of the road grader in what is called maintenance work, it isnot customary to remove much of the ground as in regular road buildingor excavating, and the broad surface of the improved cutter bar servesto smooth the loose earth or gravel as the same is drawn along the roadand, by means of the front cutting edge, to sever and remove all moundsor high places during said operation and depositing the same in the lowplaces. By reason of the relatively great thickness of the cutter bar,it will be seen that the same will last much longer than an ordinarycutter such as is in common use, and that the constant contact with. theeartn beneath and under the weight imposed on the cutter, that the frontedge 16 will gradually become dulled while the rear edge is constantlybeing sharpened, thus providing a reversible, double-edged cutting barand avoiding the necessity for removing the same for giving it a specialgrinding.

From the foregoing it will be seen that a simple and substantialimprovement has been provided for embodiment into grading machines,which has especial advantage in the operati on of grading or smoothingroad ways, the combined cutter and smoother being well calculated torender long continued use for the purpose without needing sharpening.

What is claimed is:

1. A road grader having a moldboard, said moldboard being shaped to forma seat at its lower edge, an angle iron adapted to be secured in theseat, and a cutter having means for connection to the angle iron andprovided with a front and rear cutting edge.

2. A road grader having a moldboard provided at its lower ecge with aseat, an angular cutter-carrying bar adapted to have one wing thereofbolted in said seat, the other wing of the same extending to the rear,and co-extensive in length with the moldboard, a cutter bar having afront and rear cutting edge, and means for connecting the cutter bar tothe lower face of the horizontal Wing.

3. In a road grading machine, a mold board having a depressed seat inthe front face of the lower edge thereof, an acute angle bar adapted tohave one wing secured in the seat with the other wing extendinghorizontally to the rear and from end to end of the moldboard, and acutter bar adapted to be secured to the lower face of said horizontalwing and having bevelled front and rear sides to constitute a groundcutting edge in front and rear.

4. In a road grading machine having a moldboard mounted therein foradjustment relative to the surface of the road and provided with alongitudinal seat in its lower edge, an iron bent longitudinally toprovide wings at an acute angle, one of said wings being secured in saidseat to lie substantially flush with the front face of the moldboard,the other wing extending horizontally to the rear, a relatively heavycutter bar adapted to be secured beneath the latter wing and having itsfront and rear faces inclined to provide a cutting edge at the front anda self-sharpening edge at the rear respectively, said front inclinedface being substantially flush with the angle iron and moldboard.

5. A reversible cutter bar adapted to be connected to road graders orother road maintenance machinery by means of an angle iron, the latterhaving one wing resting flat upon the bar and extending longitudinallytherewith, said cutter bar and angle iron being connected together atinter vals, said cutter bar having a front and a rear cutting edge andadapted to be reversed when either edge is worn.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature.

JAMES HENRY MOVEETY.

